Problems for specific Toyota 4Runner years:
Car problem reports
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Newest reported 1990 Toyota 4Runner problems
In some vehicles, the automatic transmissions over heat light may come with sustained highway driving or driving at a sustained speed. Our technicians tell us that flushing the transmission and changing from Dextron lll to Dextron ll can help remedy this problem.
By 100,000 miles the ignition key tends to wear out and should be replaced or it may not work as well in the door locks or ignition lock cylinder.